Comments on: 10 Useful Chaining Operators in Linux with Practical Examples

By: Paul Thompson

Paul Thompson — Sat, 14 May 2022 07:20:29 +0000

10. Example is showing escape characters, not concatenation. The operator has two functions, escape and concatenate. Concatenation example:

mkdir a b \
c d

The above will create four directories, a b, c, and d.

Escape example:
echo "This \nis on two lines."

The above outputs the line split by a \n or new line escape character:
This
is on two lines.

By: khal

khal — Mon, 14 Dec 2020 15:58:52 +0000

Thanks, very useful and enlightening examples…

By: Hauke

Hauke — Mon, 09 Nov 2020 12:56:35 +0000

Hey there,

Nice article, thank you.

I got one question. As I understand it, the following statement, within the example for the precedence operator, is false:

“In the above pseudo command, what if the Command_x1 fails? Neither of the Command_x2, Command_x3, Command_x4 would be executed, for this, we use Precedence Operator, as:”
As is command_x1 fails, command_x2 will not be executed but Command_x3 will, and the execution of Command_x4 will depend on the result of Command_x3.

Cheers

Hauke

By: Muthalagu

Muthalagu — Sat, 21 Mar 2020 14:04:50 +0000

In reply to Muthalagu.

bash: !: event not found
[root@localhost tecmint]# rm -r !(*.html)
bash: !: event not found

By: Muthalagu

Muthalagu — Sat, 21 Mar 2020 14:04:18 +0000

As per your example, NOT operator is not working you gave rm -r !(*.html).